13 FAQ tagged "operating system"

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Find Linux / UNIX Kernel Version
Q. How do I find out what kernel version I am currently running under Debian Linux or any other Linux distribution using a shell prompt?
A. Use uname command which print certain system information such as:
=> Kernel version and name
=> Print the machine hardware name
=> print the processor type
=> print the operating system etc
Howto: Linux Write protect a file
Q. How do I write protect a file under Linux? I’m using CentOS 5 server Linux operating system. I need prevent accidental changes to my files.
A. There are two ways to write protect a file under Linux.
Method #1: You can make file readonly by removing users’ write permission for a file. Under Linux and [...]
How do I find out what network services are running or listing under Linux?
Q. How do I find out what network service are running under Linux operating system?
A. For security reason it is necessary to find out what services are running. With the help of netstat command, you can print information about the Linux networking subsystem including running services. It can display program name and PID for each [...]